|Dinosaurs in Their Time
DinoGuide: Corythosaurus casuarius
dinosaurs varied considerably in the shape of their skulls.
Corythosaurus was characterized by a large bony crest composed of the nasal and
premaxillary bones. This crest extended up over the head and was
shaped like an ancient warrior's helmet from Corinth (Greece). The
arms were short, but trackways show that duck-billed dinosaurs usually
walked on all fours.
Research shows that environments
in western North America during Late Cretaceous times were
similar to those in the southern and southeastern United States
model of a restored Corythosaurus skull shows the structure
of the air passages. The skull mounted on the skeleton shows the
premaxillae, the bones normally forming only the tip of the upper
jaws, extending upward to form the front part of the crest of the
skull. The nasal bones are pushed up, forming the top and back of
the crest. The cross-section shows air passages extending up into
the crest to form an air chamber, which may have been used for making
sounds, perhaps to communicate with other members of the herd.
CARNEGIE SPECIMEN NUMBER:
SCIENTIFIC NAME MEANING:
"Cassowary-like reptile, with Corinthian helmet crest"
Dinosauria : Ornithischia : Ornithopoda : Hadrosauridae : Lambeosaurinae
to 33 feet (10 meters)
FORMATION & LOCALITY:
Dinosaur Park Formation; near Steveville, Red Deer River Valley, Alberta, Canada
Exchange from Royal Ontario Museum, Toronto; collected for ROM by Levi Sternberg, 1920
Late Cretaceous, 75–80 million years ago
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